Abstract
A new type of Ce-promoted Ni catalyst with KIT-1 as the support is prepared by using a sol-gel method. The catalyst exhibits excellent catalytic activity and superior stability in CO2 reforming of methane (CH4/CO2 reforming) reaction. Effects of CeO2 and KIT-1 with wormlike pore structure on catalytic activity are investigated by N2-physisorption, XRD, H2-TPR and TG techniques. The results indicate that the wormlike pore structure of KIT-1 is in favor of the high dispersion of metallic particles, and the doping of CeO2 promotes the dispersion of Ni particles on the surface of support, which inhibits the agglomeration and sintering of active particles in CH4/CO2 reforming reaction. Moreover, carbon deposition on the surface of the catalysts decreases obviously due to the introduction of CeO2. Experimental results during CH4/CO2 reforming show that the catalyst presented better catalytic performance than other Ni-based catalysts at 700°C and a gas hourly space velocity (GHSV) of 32 L gcat –1 h–1, which is attributed to better textural property of KIT-1, better dispersion of active species, and lower carbon deposition. Especially, 6% Ce-NiO/KIT-1 shows the best catalytic activity among the series of catalysts prepared in this experiment.
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Quan, Z.L., Li, J.F. CH4/CO2 reforming over highly active catalysts that is Ce-promoted Ni supported on KIT-1 with wormlike pore structure. Russ J Appl Chem 90, 801–810 (2017). https://doi.org/10.1134/S1070427217050226
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DOI: https://doi.org/10.1134/S1070427217050226